Have you ever observed the electrical plugs? What is the use of having two holes?

I believe that many people have paid attention to this problem, but they have not thought about why, why there are two round holes in the electrical plug? Is it just for the sake of looking good? It doesn't feel like that way when you think about it.

In fact, these two round holes on the electrical plug are very useful, but many people don't know about it, let alone use it. Now I'm going to talk about what their use is. How to use electrical plugs to make them more efficient and safer?

Utility 1: Jam the plug

When we insert the plug into the board, sometimes we will find that the plug does not know why it has fallen off, but the plug with a round hole will not have this problem, because the round hole on the plug is stuck on the conductive sheet in the board after inserting it into the board, so as to prevent it from falling off naturally or accidentally.

Utility 2: Effective power off

In fact, because some sockets are independent switches, for this kind of plug with holes, as long as the power is turned off, the circuit barrier material will pass through this circle, so as to play the role of power-off, when the switch is turned on again, the blocking device is restored, but this is internal, generally not visible.

Usefulness 3: Stop using it

When there are children or small animals at home, in order to avoid electric shock caused by children playing with plugs, the plugs that are generally not used can be locked through the round hole with a lock, so as to prevent children from inserting the plug into the electric board again. This also protects the children.

Utility 4: Hang labels

When the plug leaves the factory, there will be a parameter card, which can be convenient for everyone to choose. But because of the specialization of the plug, the parameter card can not be pasted on it, at this time this round hole can provide the function of hanging the stick, when everyone chooses, this hanging sign is useless, and you can use it directly if you remove it.

The above four points are the main reasons why there are two small round holes in the electrical plug, in fact, although these two round holes are simple, but the role is really not simple, of course, these two round holes have many other uses, so I will not explain them one by one here.

I have observed the electrical plug, the function of the two small holes on the top actually has three points, the first point is the socket fixation, the second point is the convenience switch, and the third point is the hanging label.

The main thing about the two holes is to facilitate the use of two plugs or three plugs, which is a very humanized research method.

The two holes of the plug of the electrical appliance are actually very normal and convenient, and different plugs can be plugged into it, so that it does not need to be replaced, and it will save effort.

Many students will ask why there are often two on the two-pin plug.

What about holes? Of course, this is not used to add a small lock as mentioned in the funny back**, but because the metal contacts of many plugs are relatively thin, and the contacts are clamped by two elastic metal sheets after inserting the jack, but they are easy to loosen. With the addition of these two holes, the metal contacts can be snapped together with the protrusions on the metal sheet, making it difficult for the plug to fall off.

Some newer electrical appliances have no small holes in the contacts of the two-pin plugs, because they increase the thickness of the contacts, which aggravates the deformation of the metal sheet in the jack, and can also achieve the effect of increasing the friction in the jack. As for the three-pin plug, it has the unique stability of the triangle, so there is no need to worry about it falling off the socket easily.

If you look closely in life, you will be pleasantly surprised to find that some sockets will have two small holes. Many people don't know what this small hole is used for and what it does. Attentive friends will find this phenomenon, that is, some mobile phone chargers will have two small holes on the two small pieces of iron.

This kind of socket with holes is hard to see in our country, and this kind of plug was first used in the lives of Japanese people. Therefore, generally imported electrical appliances will have these two small holes.

The plug is powered on because there are two very thin pieces of iron inside the socket. If the plug is inserted into the socket, the two small pieces of iron on the plug will come into contact with the two pieces of iron in the socket, so that the power can be applied. But after a long time, the two metal ** in the socket are very easy to loosen.

At this time, the plug with a small hole reflects its function. This

The contacts and metal pieces can be tightly fastened together, so that there will be no signs of loosening easily. This has brought great convenience to our lives.

There is also a function, that is, these two small holes have their own metal locks. Basically, every family has children. If adults do not take care of them, children can easily get electric shock if they insert the plug into the socket.

But if we lock these two pieces of iron with a lock, then they will not be inserted into the socket, and there will be no electric shock in the child. Such a role has given us a great guarantee of life and ensured the safety of children's lives.

Observe the bits and pieces around you in your daily life, and you may find something different. It may also improve our quality of life.

In fact, the biggest function of this small hole is to prevent children from being electrocuted.

These two small holes come with their own metal locks to prevent children from touching them by mistake.

This small hole comes with a metal lock, which has a great guarantee of safety.

These two small holes will make it difficult for the plug to loosen.

This is a specially designed thing to prevent the plug from coming loose.

It prevents the phenomenon of loosening of the contacts and metal sheets, and also prevents electric shock in children.

It is convenient and useful to be able to plug in different models.